ckcowl

traditionally every seam in a crazy quilt is somehow covered- either by some sort of embellishment or decorative stitching-
traditionally

it is your project and you can do as much or as little decorative stiching as you want-
since it is not blocks it may be easier for you to kind of mark blocks- make a grid depending on the size of it prehaps 10" or 12"- what ever seems (good) to you--
then you can decide which seams in that block to do---and continue around that way- it will help you keep it balanced- so it stays even across. depending on the batting you are using--the batting really determines how much quilting you have to do- some batts recommend quilting every 2" which is quite dense quilting- others allow you up to 10" between quilting lines- so see what your batting says- then look at one of those blocks- determine a good (path) of seams to do some decorative stitches over.
once you get going you may find that it goes pretty fast and you will decide to do more- just try to keep it balanced.
show us pictures---you know how we are :)